Hi @BenHoople 
welcome to the forums and thanks so much for reaching back out. To elaborate on what nathan said…
Performing a build typically involves compiling and bundling the source code and other required assets into a deployable artifact,. Starting a development server, on the other hand, involves running a local web server that can serve the application or website being developed.
Once you get the build configured you should be ready to deploy your app as normal. If you are still experiencing trouble have a read of our debugging guide below: